CVE-2026-48527CWE-79

HaxCMS has a stored Cross-Site Scripting (XSS) bypass in saveNode endpoint

High · published May 29, 2026

CVSS v3.1
8.7
EPSS
0%
Percentile
30.2
In the wild
Unconfirmed
What it is

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Versions up to and including 26.0.0 are affected by a stored cross-site scripting (XSS) vulnerability in the `/system/api/saveNode` endpoint. An authenticated user with a permission to edit pages can bypass the HTML sanitizer by injecting an event handler attribute without whitespace before the attribute name. @haxtheweb/haxcms-nodejs 26.0.1 and haxcms-php 26.0.2 patch the issue.

The record
Technical detail
CVSS v3.1
8.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00374 · 30.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-29T12:26Z
EPSS history
Timeline
  • 29 MAY 12:26Z
    HaxCMS has a stored Cross-Site Scripting (XSS) bypass in saveNode endpoint
    cvelistv5